can anyone explain this exception when compiling w...

# javascript

[Bernhard]

can anyone explain this exception when compiling with JsPlainObject and generics? java.lang.IllegalArgumentException: No container found for type parameter 'T' of 'CLASS INTERFACE name:DataFieldOptions modality:ABSTRACT visibility:public [external] superTypes:[kotlin.Any]'

@JsPlainObject
external interface DataFieldOptions<T> {
    var initial: T?
}

[Artem Kobzar]

There was an issue with the compiler plugin and it should be fixed in 2.0.20.
What version of the kmp do you use?

[Bernhard]

- org.jetbrains.kotlin.multiplatformorg.jetbrains.kotlin.multiplatform.gradle.plugin2.0.20-RC

[Artem Kobzar]

Could you check if 2.0.20-RC2 works?

[Bernhard]

same issue

[turansky]

./gradlew clean before check?

[Bernhard]

yep

[Bernhard]

the worst thing is that the stacktrace is absolutely useless to figure out where the issue occurs

[Bernhard]

if you want to try to find the cause, here's a branch https://github.com/BernhardPosselt/foundryvtt-kotlin/pull/1/files

[Bernhard]

I'll debug more later to try to figure it out, got to run a TTRPG game in 45 minutes

[Bernhard]

@JsPlainObject
external interface ArrayFieldOptions<T> : DataFieldOptions<T> {
    val min: Int?
    val max: Int?
}

[Bernhard]

this breaks it

[Bernhard]

and it's not even related to the type parameter on the child interface

[Bernhard]

e.g. this also does not compile

@JsPlainObject
external interface ArrayFieldOptions : DataFieldOptions<String> {
    val min: Int?
    val max: Int?
}

[Bernhard]

minimal example to reproduce:

@JsPlainObject
external interface Test<T> {
    val attr: T
}

@JsPlainObject
external interface Child : Test<String> {
}

[Bernhard]

https://youtrack.jetbrains.com/issue/KT-70664/Extending-a-JsPlainObject-interface-with-a-generic-type-parameter-fails-with-a-compile-error